Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Cash Flows [Abstract]
Net cash provided by operating activities	$ 19,726	$ 40,714
Cash flows from investing activities:
Sale of investment securities	7,759	2,357
Maturities of investment securities	11,308	8,112
Purchase of investment securities	(20,623)	(4,364)
Investments in real estate ventures	(871)	(533)
Purchase of subsidiaries	(668)	0
Distributions from investments in real estate ventures	1,134	219
Increase in cash surrender value of life insurance policies	(238)	(36)
Increase in restricted assets	(7)	(4)
Capital expenditures	(3,825)	(3,987)
Repayments of notes receivable	0	32
Pay downs of investment securities	258	446
Investments in real estate, net	(641)	(355)
Net cash (used in) provided by investing activities	(6,414)	1,887
Cash flows from financing activities:
Repayments of debt	(230,466)	(490)
Borrowings under revolver	94,400	55,170
Repayments on revolver	(87,420)	(61,728)
Dividends and distributions on common stock	(60,459)	(57,187)
Distributions to non-controlling interest	(285)	0
Net cash used in financing activities	(284,230)	(64,235)
Net decrease in cash, cash equivalents and restricted cash	(270,918)	(21,634)
Cash, cash equivalents and restricted cash, beginning of period	591,729	310,937
Cash, cash equivalents and restricted cash, end of period	$ 320,811	$ 289,303